Removable cutter blade for carpenters&#39; planes



y 9,1953 P. LAuscl-l 2,638,947

REMOVABLE CUTTER BLADE FOR CARPENTERS PLANES Filed April 3, 1950 IN V EN TOR. PflUL LAUJCH Patented May 19, 1953 REMOVABLE CUTTER BLADE FOR CARA-ENTERS Paul ch mond HiiL-N- Y.-

Application April 3, 1950, Serial No. 153,597 I 1 Claim.

This invention relates to carpenters planes, and the mainobject of the invention is the provision of a readily removable and replaceable cutting edge or blade for the plane.

It is by no means an uncommon experience, in using a plane, tostrike a nail or other metallic construction which was not visible, and thus damaging the blade so that the plane is unusable without being reground. This invention consists in the provision of a removable cutter or blade well secured to the body of what is customarily the cutter of the plane. Since the removable blade of this invention is relatively very small, a worker may at all times carry spares about him so that if he damages the cutter in the plane he may readily and with a minimum loss of time remove the damaged cutter and attach in its place a fresh cutter, thus eliminating the possibility of discontinuing his work or being held up at it for a long time.

The above as well as additional objects will be clarified in the following description, wherein characters of reference refer to like-numbered parts on the accompanying drawing.

Referring briefly to the drawing, Fig. 1 is a side elevational view, with parts broken away and partly in section, of a carpenter's plane embodying the improvement presented by the instant invention.

Fig. 2 is a perspective view showing three of the improved elements of a plane in spaced relationship with respect to each other prior to assembly thereof in the plane.

Fig. 3 is a fragmentary bottom plan view of the cutter body of the improved plane with the removable blade positioned thereon, showing one means of construction therefor.

Fig. 4 is a view taken on the line 4-4 of Fig. 3.

Fig. 5 is a view taken on the line 5-5 of Fig. 4.

Fig. 6 is a fragmentary bottom perspective view, in mutually spaced relationship prior to assembly, of a modified form of cutter body and its complementarily modified form of removable blade.

Fig. 7 is a sectional view taken on the line 1-1 of Fig. 6, assuming that the blade shown in Fig. 6 has been slid into position of registration on the end of the plate and the intermediate plate in place.

Referring in detail to the drawing, the numeral It indicates a carpenter's plane having the usual frame II provided with the usual transverse opening I2 through which the cutter edge projects. The cutter body or plate I3 is secured against an inclined support I4 which is, in the usual manner, adapted to be moved forwarder rearward to vary the amount of projection of the cutter edge through the opening I 2-, by means of the screw I5.

Instead of having the cutter edge providedon the lower end .ofthe plate I3 as is the case with standard planes, the plate I3, in one form of the invention, although provided with a beveled edge I6 in the manner of a cutting edge, has its lower edge serve merely as a support for a removable blade I'I. For this purpose of accommodating the plate l3 to receive the blade I1, the lower edge of the former is provided with two opposed right-angled cut-outs at the corners thereof, shown at I8. The walls 20 thus provided in alignment with each other are parallel with the edge I9 of the plate I3. However, those walls of the cut-outs I8 which are adjacent the walls 28, are further or additionally cut at an angle or bevel to provide the sloping walls 2|. Thus a tongue 22 is provided from the lower end of the plate I3, this tongue having the sloping walls 2I at its sides and having its front edge beveled as previously mentioned at I6.

The complementary blade I'I comprises the top flat section 23 provided with downwardly extending ears 24 which are turned back under the section 23 at the same angle as that of the slope of the walls 2 I. Thus the blade I! is adapted to he slipped over the tongue 22 with the ears 24 gripping frictionally and engaging the walls 2| and the rear edges of the ears registering against the cut-out walls 20. The sharpened cutting edge of the blade I! is shown at 25.

An intermediate plate 26 is used on planes between the clamp 21 and the plate I3 for the usual reason of setting the cutter, that is, looking the plate I3 against the support I I. In the instant case, however, the intermediate plate is of improved construction, that is, the lower edge or end 28 has a relatively broad and fiat foot 29 formed thereon. Thus when the improved plane containing the removable blade I1 is mounted in position, as illustrated in Figs. 1 and 4, pressure of the clamp 21 against the plate 26 forces the fiat foot 29 against the upper surface of the blade I! and thus securely locks the latter in position on the plate I3. The simple manner in which the blade I! may be removed, when damaged, and replaced by a new blade I1, is readily apparent.

In the modified form shown in Figs. 6 and 7, the lower edge of the plate here shown at I3a, instead of having the cutouts I8 previously mentioned, is merely provided with two slits 30 cut into the lower edge of the plate I 3a longitudinally for a short distance and at equal and opposite acute angles with respect to the plane of the plate 13a, each of the slits 30 being positioned at about one-third of the width of the plate apart and from the sides of the plate. The complementary removable blade Ha comprises the flat body 23a having similarly spaced thereon two ears or flaps 3| stamped'out of the body 23a and disposed at the same angles to each other as the slits 30 and similarly positioned with respect to each other and a cutting edge 25a. It is obvious that by registering the flaps 3| in the slits 30 the blade l'la may readily be slipped over the lower edge of the plate In. In use the plate I3a with the blade IIa thereon is mounted in the plane in the same manner as previously described for the plate l3 and its blade ll, that is, with the foot 29 of the intermediate plate 26 clamping or holding the. plate body 2311. against the lower edge of the plate 13a, not shown.

Obviously, various modifications may be made within the scope of the invention as defined in the claim.

I claim:

In a carpenters plane having a transverse 4 opening through the bottom thereof and having an inclined plate having a lower edge adapted to protrude through said opening, and further having means for releasably locking said plate therein, the improvement comprising a removable .blade releasably and slidably mounted on the lower end of said plate, said plate having longitudinal slits therein extending through said lower edge a distance into theplate at opposite and equal angles with respect to the plane of the plate, said blade having flaps extending downward therefrom at angles and in positions complementary to said slits and registrable in said slits whereby upon sliding of said blade over said lower edge of the plate said flaps register in said slits.

PAUL LAUSOH.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,487,529 Blackmer Mar. 18, 1924 1,651,634 Schade Dec. 6, 1927 

